Vertical ventilating shaft explosion door capable of automatically resetting after blast release and pressure relief

Abstract

The invention discloses a vertical ventilating shaft explosion door capable of automatically resetting after blast release and pressure relief, which belongs to the technical field of ventilating safety of coal mines and solves the problems that an explosion door fast depressurizes and releases blast air pressure and safely, automatically resets to close the mouth of a well and protects a ventilator device to be safely operated and normally ventilated when downhole blast impacts the mouth of a vertical ventilating shaft. A template pressure relief device and a skylight for a pilot pressure relief device capable of automatically resetting and closing are arranged on the top and a shell surface of the explosion door respectively; the explosion door is provided with four groups of hydraulic cylinders which synchronously move in two directions and are used for pulling and pushing the explosion door to automatically ascend and descend along the cylinders (tracks) and a hydraulic control and electric control system; the explosion door is also provided with a control device for operating a door body lifting hydraulic cylinder in a machine room and a pump station so as to realize natural ventilation and inverted ventilation operation; and a magnet steel sucking skylight is locked to realize inverted ventilation without manual operation. A composite technical system for operation and lifting control of the explosion door is safe and reliable, remote control operation is convenient and rapid, a ventilator is safely operated and ventilated during an accident, and an explosion-proof effect of the explosion door is achieved.

Description

technical field [0001] The invention relates to an explosion-proof door for vertical air shafts in coal mines, in particular to an explosion-proof door with a structure that can be automatically closed after being activated by an explosion wave impact on its top cover and shell surface, and belongs to the technical field of coal mine ventilation safety protection. Background technique [0002] The explosion-proof door is an important safety facility for the ventilation system of coal mines; the explosion-proof door of the vertical shaft is specially used for the main ventilator of the mine. [0003] The functions of the explosion-proof door are: 1. When the explosion wave generated by the gas and coal dust explosion in the mine rushes to the vertical wellhead, the explosion-proof door can immediately rise and open to relieve the pressure, so as to prevent the explosion wave from rushing to the fan and protect the normal operation of the fan device. ; After the explosion wave...

AI Technical Summary

Problems solved by technology

[0007] 1. The explosion-proof door is damaged when it is unbalanced and unsteady, and the trackless movement rises and opens: (1) The underground explosion wave flows through the vertical wind shaft and the fork of the wind tunnel to form a rapid flow that deviates from the axis of the wind shaft and impacts the explosion-proof door, causing the door base frame When it is obliquely separated from the oil tank, it is damaged by jamming and deformation; the reaction force deviated from the center of gravity of the door makes the door body disengage from the wire rope traction and is thrown out of the wellhead and crashes far away in the air; (2) The quality of the four supporting seats of the traction door body is unbalanced , Unbalanced weights, unequal resistance of moving parts, resulting in jamming and stagnation, four groups of heavy hammers can not lift the door body synchronously, resulting in damage to the traction mechanism, local burst deformation of the shell; (3) Therefore, the door body cannot be fully raised to open and relieve pressure When the explosion wave rushed to the ventilator through the wind tunnel, the unit was damaged, causing casualties.

[0008] 2. After the explosion wave disappears, the explosion-proof door cannot close the wellhead, and the ventilation of the mine is interrupted: (1) Even if the door body is not damaged, it stays obliquely above the wellhead without external power and cannot be lowered and reset by itself; (2) The door body or burst deformation or If it is thrown out of the wellhead and damaged, the wellhead cannot be closed; (3) The ventilator is damaged

Therefore the mine cannot be properly ventilated

[0009] 3. During natural ventilation, it is necessary to increase manpower and material resources to complete the lifting of the door body: (1) When the fan is stopped for some reason, the weight slightly larger than the weight of the door body cannot pull the door body and the natural wind pressure at the wellhead will rise, requiring more manpower and material resources Adjust the balance of the distribution of the hammer group, while dragging or supporting the traction door to rise and open in place synchronously, and then descend and reset to close the wellhead; (2) Many people working at high altitude on the edge of the wellhead endanger safety

[0011] The existing vertical wind wellhead oil tank, oil storage well, foundation seat surface of heavy hammer frame and foundation bolts belong to the concrete structure designed by the well construction project and cannot be changed

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